Analysis of blood flow velocity variability in middle cerebral artery stenosis using transcranial color-coded sonography.

Background: High variability of intracranial arterial blood flow velocities by Transcranial color-coded sonography (TCCS) has been found in clinical practice. This study aimed to improve diagnostic accuracy by analyzing influencing factors of middle cerebral artery (MCA) blood flow velocity detected by TCCS.

Methods: In total, 328 MCA vessels were classified as normal (27.

Impact of Manual Sustained Inflation vs Stepwise PEEP on Pulmonary and Cerebral Outcomes in Carotid Endarterectomy Patients.

BACKGROUND Recruitment maneuvers (RMs) are used to reduce pulmonary atelectasis in patients under general anesthesia, but they can lead to a decrease in cerebral hemodynamics. MATERIAL AND METHODS Thirty patients undergoing carotid endarterectomy were randomized to a manual sustained inflation (SI) group or a stepwise increase in PEEP (IP) group. During both RMs, the peak airway pressure (Ppeak) was maintained at 30 cmH₂O for 30 s.

Intraoperative Transcranial Doppler Monitoring Predicts the Risk of Cerebral Hyperperfusion Syndrome After Carotid Endarterectomy.

Objective: Cerebral hyperperfusion syndrome (CHS) is a rare but serious complication following carotid endarterectomy (CEA). The aim of this study was to identify intraoperative transcranial Doppler (TCD) hemodynamic predictors of CHS after CEA.

Methods: Between January 2013 and December 2018, intraoperative TCD monitoring was performed for 969 patients who underwent CEA.

Defect-induced room temperature ferromagnetism in Cu-doped InS QDs.

The practical application of existing diluted magnetic semiconductors (DMSs) depends crucially on improving their room temperature ferromagnetism. Doping, as an effective method, can be used to modulate the physical properties of semiconducting materials. Herein, we report on the observation of significant RTFM in a III-VI semiconductor compound doped with nonmagnetic impurities, Cu-doped In2S3 quantum dots (QDs) grown by a gas-liquid phase chemical deposition method.

The first atomic layer deposition process for FeN films.

An efficient process for ALD FexN films was reported in this study for the first time. Bis(N,N'-di-tert-butylacetamidinato)iron(ii) (Fe(tBu-amd)2) and anhydrous hydrazine (N2H4) were used as reactants. Ideal self-limiting growth behavior was confirmed through the effect of the reactant dose and deposition cycle number on the growth rate (film thickness).

High growth per cycle thermal atomic layer deposition of Ni films using an electron-rich precursor.

An efficient process for thermal atomic layer deposition (ALD) of Ni film with high growth per cycle (GPC) value is developed in this study using an electron-rich compound (N,N,N',N'-tetramethylethylenediamine) (bis(2,4-pentanedionato)) nickel(ii) and anhydrous hydrazine as the reactants. The thermal properties and adsorption behavior of selected compounds were studied. Significantly, a high film GPC value of 2.

One-step detonation-assisted synthesis of FeO-Fe@BCNT composite towards high performance lithium-ion batteries.

An FeO-Fe@BCNT composite was successfully synthesized via detonation of a mixture of hexogen (CHNO) and ferrocene (CHFe), in which bamboo-like carbon nanotubes encapsulating iron nanoparticles attached to FeO flakes (up to 58.1%) were formed. In the detonation process, hexogen was used to generate high temperature and high pressure, while ferrocene was used as a carbon source and catalyst.